*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    :root {
      --accent:     #4a9fd4;
      --bg:         #f0f5fa;
      --surface:    #ffffff;
      --border:     #6b8fa8;
      --text:       #1a3a5c;
      --text-muted: #476888;
      --radius:     12px;
      --radius-sm:  8px;
      --shadow:     0 1px 3px rgba(15,23,42,.06), 0 1px 2px rgba(15,23,42,.04);
    }
    body {
      font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      background: var(--bg);
      color: var(--text);
      font-size: 14px;
      line-height: 1.65;
      display: flex;
      flex-direction: column;
      min-height: 100vh;
      min-height: 100dvh;
    }
    .content {
      flex: 1;
      max-width: 640px;
      margin: 32px auto;
      padding: 0 16px 40px;
      width: 100%;
    }
    .card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      padding: 28px 32px;
    }
    h2 { font-size: 18px; font-weight: 700; margin-bottom: 6px; }
    .subtitle { color: var(--text-muted); margin-bottom: 28px; font-size: 13px; }
    .form-group { display: flex; flex-direction: column; gap: 5px; margin-bottom: 18px; }
    label { font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: .5px; color: var(--text-muted); }
    input[type=email], select {
      height: 40px;
      border: 1.5px solid var(--border);
      border-radius: var(--radius-sm);
      padding: 0 12px;
      font-size: 14px;
      font-family: inherit;
      background: var(--bg);
      color: var(--text);
      outline: none;
      transition: border-color .15s, box-shadow .15s;
      width: 100%;
    }
    input[type=email]:focus {
      border-color: var(--accent);
      background: var(--surface);
      box-shadow: 0 0 0 3px rgba(74,159,212,0.15);
    }
    input[type=email]:disabled {
      color: var(--text-muted);
      cursor: default;
      opacity: 1;
    }
    .hint { font-size: 11px; color: var(--text-muted); }
    .checkbox-group {
      border: 1.5px solid var(--border);
      border-radius: var(--radius-sm);
      background: var(--bg);
      overflow: hidden;
    }
    .check-all-row {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 9px 12px;
      font-size: 13px;
      font-weight: 600;
      cursor: pointer;
      border-bottom: 1px solid var(--border);
      background: var(--surface);
    }
    .check-all-row input[type=checkbox] { cursor: pointer; accent-color: var(--accent); }
    .check-items {
      padding: 8px 12px;
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
    }
    .check-item {
      display: flex;
      align-items: center;
      gap: 6px;
      font-size: 13px;
      cursor: pointer;
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 6px;
      padding: 7px 12px;
      min-height: 40px;
      transition: border-color .12s, background .12s;
      -webkit-tap-highlight-color: transparent;
    }
    .check-item:hover { border-color: var(--accent); }
    .check-item input[type=checkbox] { cursor: pointer; accent-color: var(--accent); }
    .check-item input[type=checkbox]:checked + span { font-weight: 600; color: var(--accent); }
    .check-item:has(input:checked) { border-color: var(--accent); background: #e8f4fb; }
    .option-group {
      border: 1.5px solid var(--border);
      border-radius: var(--radius-sm);
      background: var(--bg);
      padding: 8px;
      display: grid;
      gap: 8px;
    }
    .option-group.compact { gap: 6px; }
    .option-item {
      display: grid;
      grid-template-columns: 18px 1fr;
      gap: 9px;
      align-items: start;
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 6px;
      padding: 10px 12px;
      cursor: pointer;
      text-transform: none;
      letter-spacing: 0;
      color: var(--text);
      font-size: 13px;
      min-height: 48px;
      transition: border-color .12s, background .12s;
    }
    .option-item:hover { border-color: var(--accent); }
    .option-item:has(input:checked) { border-color: var(--accent); background: #e8f4fb; }
    .option-item input[type=radio] {
      margin-top: 2px;
      cursor: pointer;
      accent-color: var(--accent);
    }
    .option-item span {
      display: grid;
      gap: 2px;
    }
    .option-item strong {
      color: var(--text);
      font-size: 13px;
      line-height: 1.25;
    }
    .option-item input[type=radio]:checked + span strong { color: var(--accent); }
    .option-item small {
      color: var(--text-muted);
      font-size: 11px;
      line-height: 1.35;
      font-weight: 500;
    }
    .btn-primary {
      width: 100%;
      min-height: 48px;
      background: var(--accent);
      color: #fff;
      border: none;
      border-radius: var(--radius-sm);
      font-size: 15px;
      font-weight: 600;
      font-family: inherit;
      cursor: pointer;
      margin-top: 8px;
      transition: background .15s;
      -webkit-tap-highlight-color: transparent;
    }
    .btn-primary:hover { background: #3a8fc4; }
    .btn-primary:disabled { background: #93C5FD; cursor: default; }
    .btn-secondary {
      width: 100%;
      min-height: 44px;
      background: var(--surface);
      color: #B91C1C;
      border: 1.5px solid #FCA5A5;
      border-radius: var(--radius-sm);
      font-size: 14px;
      font-weight: 600;
      font-family: inherit;
      cursor: pointer;
      margin-top: 10px;
      transition: background .15s, border-color .15s;
      -webkit-tap-highlight-color: transparent;
    }
    .btn-secondary:hover { background: #FEF2F2; border-color: #EF4444; }
    .btn-secondary:disabled { opacity: .7; cursor: default; }
    #form-msg { margin-top: 14px; font-size: 13px; font-weight: 500; text-align: center; }
    #form-msg.ok  { color: #16A34A; }
    #form-msg.err { color: #DC2626; }
    .info-box {
      background: var(--accent-light, #e4f3ef);
      border: 1px solid #c4e0d8;
      border-radius: var(--radius-sm);
      padding: 12px 16px;
      font-size: 13px;
      color: #1a3a5c;
      margin-bottom: 24px;
      display: flex;
      gap: 10px;
      align-items: flex-start;
    }
    .err-box {
      background: #FEF2F2;
      border-color: #FCA5A5;
      color: #991B1B;
    }
    footer {
      background: #1a3a5c;
      padding: 12px 24px;
      padding-bottom: calc(12px + env(safe-area-inset-bottom));
      text-align: center;
      font-size: 12px;
      color: #7ab8d9;
      flex-shrink: 0;
    }
    footer a { color: #a8c8e0; text-decoration: none; }
    footer a:hover { color: #ffffff; }

    .check-all-row {
      min-height: 44px;
    }

    @media (max-width: 600px) {
      .content { margin: 16px auto; padding: 0 12px 32px; }
      .card { padding: 20px 16px; }
      input[type=email] { font-size: 16px; /* verhindert iOS Zoom beim Fokus */ }
    }